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Help me fix my boost tune.

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Old 04-19-2012, 08:37 PM
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Originally Posted by black04silverado
Im pretty new to tuning and I have been trying to tune my truck.
I do think im getting somewhere but i need some help.
down low out of boost my a/f is 10.0 until it builds boost then wot its around 11.5-11.6 sometimes the other times its stupid lean like 15.2 or higher under light throttle. its got me confused...
set up is lq9 76mm turbo 10lbs stock everything else.
can someone look at my tune and help me out..

Injector data doesn't look right. What injectors are you using?
Old 04-20-2012, 09:12 AM
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Originally Posted by KLUG'S SS
Injector data doesn't look right. What injectors are you using?
they are deatschwerks injectors on the flow chart they gave me at 58psi they are 70lbs
Old 04-20-2012, 10:19 AM
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What data did you change in the tune for the injectors? You have to change more than the flow rate.
Old 04-20-2012, 10:47 AM
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Originally Posted by oakley6575
What data did you change in the tune for the injectors? You have to change more than the flow rate.
all that i changed was flow rate. What other things should be changed?
Old 04-20-2012, 11:29 AM
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Originally Posted by black04silverado
all that i changed was flow rate. What other things should be changed?

Offsets (voltage) table, short pulse adder, min. inj. pulsewidth, etc.....


What happens by not getting the injector characterization completely right in the tune like for example going with big/bigger injectors and just changing the flow rate only is you end up making up for the fueling error in the VE and MAF tables and this is how someone can easily end up with some funky looking values in their airflow tables.
Old 04-20-2012, 11:52 AM
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Originally Posted by KLUG'S SS
Offsets (voltage) table, short pulse adder, min. inj. pulsewidth, etc.....


What happens by not getting the injector characterization completely right in the tune like for example going with big/bigger injectors and just changing the flow rate only is you end up making up for the fueling error in the VE and MAF tables and this is how someone can easily end up with some funky looking values in their airflow tables.
Ohh okay I see
when i get home tonight I will change them and see how it helps.


Does anyone have a stockish boosted lq9 tune I can cheat off of ?
Old 04-20-2012, 03:07 PM
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The douche werks injector don't have data or they will not give it up at least. I run their 105s and they took me a while to get right. I'd pay for a sponsor tune and work off of that before you **** up your stuff. New to tuning boost and sucky injectors is a good recipe for carnage.
Old 04-20-2012, 04:04 PM
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Originally Posted by tarinitup
The douche werks injector don't have data or they will not give it up at least. I run their 105s and they took me a while to get right. I'd pay for a sponsor tune and work off of that before you **** up your stuff. New to tuning boost and sucky injectors is a good recipe for carnage.
Yep,, i think i killed my 5.3 learning how to tune for boost..
Old 04-21-2012, 03:46 PM
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Originally Posted by tarinitup
The douche werks injector don't have data or they will not give it up at least. I run their 105s and they took me a while to get right. I'd pay for a sponsor tune and work off of that before you **** up your stuff. New to tuning boost and sucky injectors is a good recipe for carnage.
They gave me flow rate print out when I got mine
I picked them cause they were local and they gave me a great deal.
I did learn a few things tuning yesterday.
main thing I learned was timing... dont have it turned up to much and go wot...
Old 04-21-2012, 03:51 PM
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Get a little detonation? Hopefully you didn't cause any damage.


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